Mount Ayanganna is a sandstone

Sandstone

Sandstone is a sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow,...

 tepui

Tepui

A tepui , or tepuy, is a table-top mountain or mesa found in the Guiana Highlands of South America, especially in Venezuela. The word tepui means "house of the gods" in the native tongue of the Pemon, the indigenous people who inhabit the Gran Sabana....

 in the Pakaraima Mountains of western Guyana

Guyana

Guyana , officially the Co-operative Republic of Guyana, previously the colony of British Guiana, is a sovereign state on the northern coast of South America that is culturally part of the Anglophone Caribbean. Guyana was a former colony of the Dutch and of the British...

, 85 kilometres east of Mount Roraima

Monte Roraima

Mount Roraima is the highest of the Pakaraima chain of tepui plateau in South America. First described by the English explorer Sir Walter Raleigh in 1596, its summit area is defended by 400-metre-tall cliffs on all sides...

 at 5°23′N 59°59′W. With a height of 2,041 metres (6,696 feet) it is the easternmost tepui taller than 2,000 metres. It is part of the Guiana Shield.

Mount Ayanganna is fully within Guyanese territory and is surrounded by rainforest

Rainforest

Rainforests are forests characterized by high rainfall, with definitions based on a minimum normal annual rainfall of 1750-2000 mm...

.

Ever since Guyana became a Republic

Republic

A republic is a form of government in which the people, or some significant portion of them, have supreme control over the government and where offices of state are elected or chosen by elected people. In modern times, a common simplified definition of a republic is a government where the head of...

 on 23 February 1970, the national flag is hoisted ceremoniously each year on Mount Ayanganna on the eve of the country's Republic Anniversary by members of the Guyana Defence Force

Guyana Defence Force

The Guyana Defence Force is the military service of Guyana.-History:The GDF was formed on November 1, 1965. Members of the new Defence Force were drawn from the British Guiana Volunteer Force , Special Service Unit , British Guiana Police Force BGPF and civilians...

 (GDF). The GDF named their Georgetown

Georgetown, Guyana

Georgetown, estimated population 239,227 , is the capital and largest city of Guyana, located in the Demerara-Mahaica region. It is situated on the Atlantic Ocean coast at the mouth of the Demerara River and it was nicknamed 'Garden City of the Caribbean.' Georgetown is located at . The city serves...

base after Mount Ayanganna.

On 1 November 2005 28 female soldiers hoisted the national flag on the summit after a two day climb.